Anchoring means for portable tool supports



Oct, 13, 1931. J JENSEN 1,826,937

ANCHQRING MEANS FOR PORTABLE TOOL SUPPORTS Filed Oct. 10, 1928 LTohn/ Jms'am Patented Oct. 13, 1931 UNITED STATES PATENT OFFICE JOHN JENSEN, OF ROCKFORD, ILLINOIS, ASSIGNOR TO WHITNEY METAL TOOL (10., OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS AN CHORING MEANS FOR- PORTABLE TOOL SUPPORTS Application filed October 10, 1928.

The invention has particular reference to an anchoring means for a portable tool support adapted to prevent movement of the support during the working operation of 5 the tool.

In the class of machines to which this invention is especially pertinent, machine tools of various types are mounted on supports which may be moved freely and easily from one part of the shop to another. It has been found difficult to prevent movement of the tool support during the working operation of the tool which is apt to result in spoiled or inaccurate work or else slows down the 1 speed of production, due to the unnecessarily increased care with which the tool must be operated. The present invention, therefore,

resides in the provision of a new and improved anchoring means which is adapted positively to prevent movement or displacement of a tool support in anydirection when the anchoring means is in operative position.

Another object of the invention is to provide a new and improved means of this character which is simple and sturdy in construction, eflicient in operation and which may be easily moved into and held in inoperative position if desired.-

Other objects and advantages will become apparent in the following description and from the accompanying drawings, in which:

Figure 1 is a view in perspective of a portable machine tool showing a preferred form of the invention embodied thereon.

Fig. 2 is a fragmentary elevational view of one of the devices mounted on a supporting member.

3 is a section through one of the supporting members taken substantially on the line 33 of Fig. 2.

While the invention is susceptible of various modifications and alternative constructions, I have shown in the drawings and will herein describe in detail the preferred embodiment, but it is to be understood that I do not thereby intend to limit the invention to the specific form disclosed but intend to cover all modifications and alternative construc- 50 tions falling within the spirit and scope of Serial No. 311,552.

invention, for the purpose of illustration only has been shown as embodied upon the sup porting frame 5 of a portable metal punch. This supporting frame is of any suitable structure having a top 6, upon which the tool, indicated generally at 7 is mounted, spaced an appropriate distance from the floor by means of legs 8. Movement of the support ing frame and tool, which is generally quite heavy, from one part of the shop to another is facilitated by mounting a well known type of ball bearing caster 9 upon the lower end of each of the legs.

The means by which the movable support is held positively against movement in any direction comprises a plurality of anchoring devices designated generally at 10 (Fig. 1), each secured to one of the legs 8 of the stand and extending therefrom into engagement with an adjacent portion of the floor in a direction substantially radially of the vertical center of the support. Inasmuch as each of the devices are substantially similar in construction, only one will be described in detail.

Referring to Fig. 2, the anchoring device 10 comprises an arm or brace 11 mounted for vertical swinging movement by such means as the horizontal pivot 12 supported between a pair of lugs 13 (Fig. 3) which are preferably formed integrally with a bracket 14. The bracket is properly shaped to fit upon the outer surface of the leg 8 with the lugs 13 extending outwardly from the leg at an angle to each of the sides of the support adjacent the leg, as in the present instance where an angularly formed bracket fits upon the angular surface of the leg. Suitable securing means, such as rivets 15, through each of the angular sides of the bracket and the underlying portion of the leg permanently fix the bracket on the leg. The arm 11 is of such length that when the arm is swung outwardly,

the free end thereof engages the floor a substantial distance from the lower end of the' leg. The arm is adapted to engage the floor positively, and for this purpose preferably is tapered as at 16 to a relatively sharp point which may be hardened to prevent undue wear thereof.

The pivotal mounting of the arm 11 permits it to be swung vertically to a remote out-ofthe-way position in which the arm extends upwardly along the side of the leg 8 as shown in'full lines in Fig. 2. Inasmuch as the pivot 12 is spaced from the side of the leg 8 by the lugs 13, the arm'wvhen in its upwardly extending position will slope inwardly toward the leg and tends. to remain in this remote position. Means however, may be provided for positively maintaining the leg in this position, which, in the present instance, comprises a clamping ring 17 encircling the leg 8 and slid able freely longitudinally of the leg. The ring 17"is of suflicient size to fit over the free end of the arm 11 when the arm is in its raised position thereby positively holding the arm out of the way. When not in use, the ring may slide downwardly of the leg to rest upon a part of the supporting frame such as the braces 18. 7 A holding means of this character is particularly advantageous since in the operation of the tool it cannot be knocked ofl or accidentally damaged.

The 0 ation of the device it will be seen is excee ingly simple. Vhen the tool is to bemoved from one part of the shop to another the arnm 11 are swung upwardly and latched in their remote position by the rings 17. Aftor the tool has been movedto the desired location each of the arms 11 are swung downwerdly into engagement with the floor and since each 'off the arms extends outwardly from the leg at such an angle to the adjacent sides of each leg that the arms extend substnntially radially of the vertical center of the boot sup rt, the tool will be anchored or p hlessed against movementin any direction. s anchoring action is intensified by the fact that tools of this character and their suprts are quite heavy so that after the arms ve. engaged the floor any force tending to move the tools serves only further to embed the ends of the arms in the floor.

I claim as myinverrtion:

1. An anchoring means for a portable tool support comprising, in combination. a plurality of arms mounted on said support for outward vertical swinging movement relative thereto into and out of engagement with the floor, said mounting being such that the arms extend from the support substantially radially in different directions from the vertical center of said support.

2;. A portable tool having, in combination with a support for said tool including a plurality of legs having anti-friction elements at their lower ends, anchoring means for preventing movement of said support in any direction, said means comprising an elongated pointed arm, a bracket secured to each of said legs, means pivotally connecting said arm to said bracket for vertical swinging movement to bring the free ends of said arms into and out of engagement with the floor at a point spaced from said anti-friction elements, said brackets being somounted on the legs that the arms supported thereby swing outwardly from the legs at an angle to the planes of the sides adjacent the legs.

3. A portable tool having, in combination with a support movable from place to place, and including a plurality of legs, anchoring means for holding said support against movement in any direction comprising an elongated arm carried by each leg, and means for swingably securing said arms to said legs for movement vertically into and out of engagement with the floor at points spaced from the legs, said securing means being positioned on each of said legs to extend the respective arm therefrom at an angle to the planes of the sides of the support adjacent the leg.

4. An anchoring means for a portable tool comprising, in combination with a supportfor said tool having a plurality of legs, an elongated arm for each leg, means supporting one of said arms from each leg for swinging movement from a. remote position extending upwardly along the leg to a floor engaging position at a point spaced from the leg, and vertically slidable means on each of said legs adapted to slip over and engage the respective arms to hold said arms in the remote position.

5. Anchoring means of the character described comprising, in combination with a tool-supporting carriage mounted upon universal casters to roll in all directions upon a floor, a plurality of braces mounted on said carriage, for movement relative thereto into positions extending downwardly and outwardly in different radial directions from said carriage with the lower ends thereof in engagement with the floor whereby to anchor or race said carriage against lateral movement in all directions.

6. Anchoring means of the character described comprising, in combination with a carriage having rollers to run upon the floor, a pluralit of anchoring devices each comprising a race pivoted at one end to the carriage and arranged to extend downwardly and outwardly from the carriage with its free end in en gement with the floor, each of said devices 11 in operative position constituting the hypotenuse of an imaginary triangle of which the base line is coincident with the floor surface and the altitude is a portion of said carriage between the floor and the pivot point of said brace whereby the group of braces in operative position converge up- Wardly and inwardly toward the vertical center line of said carriage to anchor the carriage against movement in all directions.

In testimony whereof, I have hereunto affixed my slgnature.

JOHN JENSEN. 

